Process of manufacturing metallic manganese and aluminum fluorid.



UNITED STATES PATENT OFFICE.

WALTER S. ROCKEY AND HILLIABY ELDRIDGE, OF NEW YORK, N. Y.

PROCESS OF MANUFACTURING METALLIC MANGANESE AND ALUMINUM FLUORID.

No Drawing.

Specification of Letters Patent.

Application flled'September 26, 1910. Serial No. 583,897.

Patented Apr. 4, 1911.

To all whom it may concern:

Be it known that we, WALTER S. Rooney and IIILLIARY ELDRIDGE, citizens of the United States, both residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Processes of Manufacturing Metallic Manganese and :AluminumFluorid, of which the following is a full, clear, and exact specification.

Our-invention relates to the process of manufacturim metallic manganese and aluminum fluorid, and the object of our invention is to provide a process of manufacturing the same.

-Ve provide a suitable refractory crucible or tilting hearth composed of material neutral to the chemical action of the ingredients to be treated, which may be made of material such as magnesite. We then place in said crucible or tilting hearth a mixture of dry calcium fluorid to serve as a flux and dry manganese fluorid and metallic aluminumhaving an excess of calcium fluorid and manganese fluorid present, and heat the same until the aluminum reacts on the manganese fluorid which in so doing takes the fiuorin away from the manganese fluorid thus forming aluminum fluorid and freeing metallic manganese, as per the following equation The manganese is precipitated by gravity to the bottom of the crucible or hearth, the aluminum fluorid which is thus formed by this reaction mixes with the calcium fluorid of the mixture, the manganese can be poured out of the crucible into molds and the molten consists in placing to ether dry calcium and heating same until the aluminum reacts on the manganese fluorid and forms aluminum fluorid and frees metallic manganese. 2. The process of manufacturing metallic manganese and aluminum fluorid, which consists in placing a mixture of dry calcium fluorid to serve as a flux, dry manganese fluorid and metallic aluminum, said calcium fluorid and manganese fluorid being in excess, into a suitable crucible or tilting hearth, and fusing andlheating same until the aluminum reacts on the manganese fluorid and forms aluminum fluorid and frees metallic manganese. v

3. The process of manufacturing metallic manganese and aluminum fluorid, which consists in .placing'a mixture of dry calcium fluorid to serve as a flux, dry manganese fluorid and metallic aluminum, said calcium fluorid and manganese fluorid being in exsis cess, into a suitable crucible or tilting hearth, Y

and fusing and heating same until the aluminum reacts on the manganese fluorid and forms aluminum fluorid and frees metallic manganese, then pouring said metallic manganese and said fluorids from said crucibleand protecting said manganese beneath the surface of said fluorids during the said op eration and then cooling said manganese be 'ncath the surface of said fluorids. 

